package io;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
/**
 * 文件的复制(慢读写)
 * */
public class CopyDemo {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("壁纸.png");
        FileOutputStream fos = new FileOutputStream("壁纸1.png");

        long stsrt = System.currentTimeMillis();
        int d;
        while ((d=fis.read())!=-1){
            fos.write(d);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制完毕,总计耗时:"+(stsrt-end)+"ms");
        fis.close();
        fos.close();

    }
}
